Boiler



(No Model.)

C. HALLETT.

BOILER.

Patented Oct. 4, 1892.

THE Noms wenns no., mom-mum, wAsmNofoN, n. cy

UNITED STATES PATENT OEEIcE.

CHARLES I'IALLETT, OF RIVERHEAD, NEW YORK, ASSIGNOR 'lO THE IIALLETT BOILER COMPANY, OF NEW JERSEY.

BOILER.

SPECIFICATION forming part of Letters Patent No. 483,612, dated October 4, 1892.

Application filed February 20, 1892. Serial No. 422,290. (No model.)

To all whom t may concern:

Be it known vthat I, CHAELEs HALLETT, a citizen of the United States, residing at Riverhead, in the county of Sudolk and State of New York, have invented certain new and useful Improvements in Boilers, as set forth in the accompanying. drawings, forming part of this specication, in which- Figure l represents a vertical sectional view of a boiler embodying my invention. Fig. 2 is a horizontal sectional View on the line c x of Fig. l.

My invention relates to boilers generally, and particularly to that. class denominated porcupine boilers, in which the boiler has a vertical series of radially-disposed horizontal water-tubes located in the path of the ascending gases and products of combustion from the iire-boxes. It is an improvement on my former patent, No. 402,441, granted to me April 30, 1889, for an improvement in boilers; and it consists, essentially, in connecting with and supportin g above and outside of the main boiler, but within the exterior casing of the boiler, a supplemental boiler or heater having horizontal tubes radially disposed in vertical series and in connecting said supplemental boiler or heater with the feed-water supply, whereby the water may be heated by the ascending products of combustion and thence fed to the main boiler.

My invention also contemplates connecting the steam-space of the main boiler with the supplemental boiler, whereby said boiler may also serve as a superheater for steam when the feed-water supply is cut-off, thereby enabling me to utilize the waste heat and gases which have passed the main boiler on their way to the stack or iiue for this purpose.

My invention further consists in the interposition of pipes and valves between the main and supplemental boilers and feed-water and steam supply to cut off or direct the flow of either steam or water, and also in a means for promoting the circulation of the water and enabling the supplemental boiler to be cut off from the main boiler without affecting the latter and to be removed and replaced when desired.

My invention also consists of the construc- Referring to the accompanying drawings for a more complete explanation of my invention, A represents the outer shell or casing of the boiler, which may be of the usual form and constructed of any suitable material and is provided with grate-bars B and ash-pit C, as shown.

Within the outer shell or casingAthe main boiler D is centrally located and provided with a vertical series of horizontally-arranged radiallyfdisposed tubes E, having their inner ends open and communicating with the interior of the main boiler D, as fully disclosed in my said former patent. The upper head of the main boiler is pierced to receive the lower open end of a coupling F, having four branches a, b, c, and d, respectively, and which has its upper end closed, suitable flanges being formed on the coupling to enable it to be riveted to the upper head of the main boiler and to the lower head of the supplementalV boiler G. This supplemental boiler G is of cylindrical or other form, having its lower end seated upon and riveted to one'ot` the flanges on the coupling F, which latter has its upper closed end passing into tle bottom of the supplemental boilerthrough a stuffingbox of usual form, and through this coupling passes a vertical pipe l-I, connecting with both boilers and having both ends open and communicating with the interior of said boilers, as shown. The upper head of the supplemental boiler is provided with a manhole I, through which access mayr be had to the interior of the boiler, and within the latter is secured an open-bottom chamber J, concentric with the pipe H and walls of the supplemental boiler and interposed between the same, as shown. The supplemental boiler is separate and independent of the main boiler and is supported by the couplingF above the latter and in the path of the ascending gases roo 35 Y n tion to the water'drscharging through the p1 pe' and products of combustion, andY it is provided with a vertical series of horizontal radially-arrangedwater-tubesrK, similar to those on the main boiler, and which receive the'full eEect of the heat and gases which have passed the main boiler, and are on their way to the stack. By 'thus locating the supplemental boiler at the point indicated I ami-enabled to utilize the Vheretofore waste heatYY for superheating water or steam within the supplemental boiler, as I will hereinafter indicate.

One of the branches c ofthe coupling F has fitted to it the main steam-pipe L, while from the'other branch hleads a pipe M, which leads to the lower portion of the supplemental boiler and is provided with a valve e, whose stem f extends through a stuffing-box in the outer casing or shell A to the outside of the boiler, whereby itVV may be operated to'turn the valve and open or cutoff communication between the two boilers when desired, and also to Hush or clear the supplemental boiler. The pipe P connects with the feed-watersupply and enters through the lower part of the casing or'ishell to the main boiler, and it has a valve gjfor controlling the supply at this point. A-'pipe N connects withY the feed-water pipe P and extends-upwardly to a point near the upper end of the supplemental boiler and has its upper end h passing through the shell or casing and entering the supplemental boiler, as shown, said end h being curved and located within the space formed by the concentric chamber J and inner wall of the supplemental boiler, so as to impart a rotary Ino- N into said boiler. A steam-pipe O has its inner end comm'unicatinglwith the upper portion of the chamber J, and from thenceit leads outward'and connects with the main Ysteampipe L, said pipes L and O each having a controlling-valve if and m, respectively. From the lower part of the supplemental boiler leads ablow-off pipe Q, and within the pipe H is a valve R, whose stemrextends through stuffing-boxes in the couplingfF and shell or casingA and is provided with means ley-which it may be turned to open or close the connecting-passage between the main and supplementaiboilers.V

From the description of the arrangement and construction of parts heretofore given it will be seen that by interposing the supplemental boiler within the upper portion of the shell or outer casing and above the main boiler,'where it will receive the full effect of the heretofore waste gases and products of combustion escapingrto the mainriiueror stack, and by introducing the pipe connections between the two boilers and the feed-Water supply I am enabled to form of the supplemental boiler= a superheater of the feed-water and also a medium by which steam may be superheated when the feed-water supply is cut oft from the said boiler; also, in the event of accident or leakage of the tubes of the supplemental beiler or from any other cause the YYcharged withY alkali, boiler, operates injuriously upon it and often supplemental boiler may be shutoff from the main boiler without affecting the operation of the latter. Y

In using the main boiler only the feed-wa` ter is brought into the boiler through the pipe Pgthe valve in the latter being open and the valve in the pipeY N being closed. The water rises in the main boiler, Iilling its tubes, but leaving a steam-,spacev above in communication with the lower openY end of the coupling F, whereby steam generated within therboiler passes into the hollow coupling, which, being closed at the top, forms a steam-chamber. As the supplemental boiler is in the path of the intense heat from the fire-boxes, it will be desirable to conduct the steam from the steamchamber in the coupling F to said boiler to prevent the latter and its tubes burning out. Therefore I use the pipe M, which leads from the branch b of the coupling, and open its valve to permit the steam to pass directly to the boiler, where it becomes superheated by the ascending gases and heat and finally escapes through pipeO to thermain steam-pipe,

it being understood in such cases as above noted that the valveR in the pipe His closed to cut ot't communication between the two boilers.

Instances often occur when these boilers are used inY places where the feed-water is highly which, entering the converts the water into a thick foam, which Vretards the successful operation of the boiler IOO and also causes a deposit of lime and sedi-Y er s mentary material Ywithinthe boiler. For the purpose ot' relieving the main boiler from the objections and injuries incident to the use of such waters as above my supplemental boiler is especially useful, as by closing the valve in the pipe P, opening the valves into the pipes H and N, and closing the valves in the pipes M and O, I introduce the feed-water into the supplemental boiler. The end of the pipe N being curved, the water enters the latter boiler and is given a rotary motion andr then passes up between the chamber YJ and the pipeIl, thereby accelerating the' vcirculationin the tubes, and enters the pipe Hand finally iows through this pipe to the main boiler. The steam which is generated in the main boiler now passes into the chamber in the coupling and nally passes out through the main steam-l pipe, whose valve is open, while whatever steam may arise in the supplemental boiler passes through pipe O to the main steam-l pipe. In the event of sedimentary deposit in the supplemental boiler the valves in Ythe pipes H, N, O, and P and the main steam-pipe are closed and the valve in the pipe M is opened, when the steam from the main boiler passes through pipe M into the supplemental boiler, near its lower portion, and blows out the sediment through the blow-oh cock Q; also, by closing the valves in all of the pipes and opening the draw-oft Q the water in the supplemental boiler may be drawn od when IIO desired. I am thus enabled to use the supplemental boiler as a superheater for feedwater or steam, and utilize the heretofore- Wasted gases and products of combustion as the heating medium and can at all times control the circulation and operate the said main boiler with or without the supplemental boiler.

By constructing the supplemental boiler as described and tting it to the coupling, which in turn is fitted to the outside of the main boiler, the said supplemental boiler simply becomes an attachment which may be cheaply constructed and applied and removed and replaced without difficulty.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combinatiomwith a main boiler connected with the feed-water supply, of a supplemental boiler detachably fitted to and above the main boiler and having radial tubes located in the path of the gases and products `of combustion which have passed the main boiler, a pipe connecting the supplemental boiler with the feed-water supply, and a pipe connection between the main and supplemental boilers, substantially as herein described.

2. The combination, with a main boiler connected with the feed-water supply, of a coupling fitted to the exterior of its upper head, having its upper end closed and its lower end open and provided with branches, a supplemental boiler fitted to and supported by the coupling and having radial tubes located in the path of the gases and products of combustion which have passed the main boiler, a pipe connecting with the steam-chamber of the coupling and delivering the steam from the main boiler to the supplemental boiler, a main steam-pipe, and a steam-pipe leading from the supplemental boiler and connecting with the main steam-pipe, substantially as herein described.

3. The combination, with the main boiler connected with the feed-water supply, of a coupling fitted to the upper head of said boiler, a supplemental boiler fitted to and supported by the coupling and provided With radial tubes, said coupling being closed at its upper end and open at its bottom, a feed-water pipe leading to the supplemental boiler, a connection between the main and supplemental boilcrs,a steam-pipeleading from the steam-chamber of the coupling, and a second steam-pipe leading from the supplemental boiler to the main steam-pipe, substantially as herein described.

4. The combination of main and supplemental boilers, each of which connects with the feed-Water supply, a coupling forming a connection between said boilers, having its lower end open and in connection with the steam-space of the main boiler, a pipe passing through the coupling and forming a connection between the two boilers, a valve in said pipe for cutting the supplemental boiler off from the main boiler, and steam-pipes leading from the steam-space of the coupling and the supplemental boiler, respectively, substantially as herein described.

5. A supplemental boiler adapted to be detachably fitted upon the main boiler and having radial water-tubes, a chamber J within the boiler, having a closed upper end and open bottom, n pipe leading from the feed-water` supply to the supplemental chamber between the inner wall of the same and the outer wall of the chamber J and having its discharge end curved to impart a rotary motion to the water, a coupling fitted to the supplemental boiler, having a closed upper end and an open lower end adapted to enter the steam-space of the main boiler, a steam-pipe leading from the chamber J and asteam-pipe leading from the coupling, and a valve-controlled pipe leading from the interior ofthe chamber J through the coupling to the main boiler, substantially as herein described.

G. The combination of a main boiler, a supplemental boiler having radial tubes, a coupling supporting the latter boiler above and outside of the main boiler, having its lower end open and receiving steam from the main boiler, a valve-controlled pipe M, leading from the steam-space of the coupling to the'lower portion of the supplemental boiler for flushing the latter, a draw-off cock from the supplemental boiler, through which sedimentary deposits may be drawn on?, and a valve-controlled pi pe communicating with both boilers, whereby one may be cut off from the other, substantially as herein described.

CHARLES H ALLET'F.

Witnesses:

T. WALTER FowLER, CHAPMAN W. FOWLER.

IOC 

